Kestrel 2500NV - Night Vision - Olive Drab
The Kestrel 2500NV (night vision) takes wind, temperature, and barometric pressure readings all in a small pocket sized form - just like the standard Kestrel 2500, but with the addition of a red back light and olive drab colour.
Developed in 2005 due to demand from military and law enforcement personnel, the Kestrel 2500NV has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.
It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light bleaches out the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this bleaching out, preventing night blindness and night vision fatigue.
Looking for a Night Vision Kestrel with a few more features, such a humidity sensor? Try the next model up in the Kestrel NV range the Kestrel 3500NV.
Kestrel 2500NV Measures
- Current Wind Speed
- Maximum Wind Gust
- Average Wind Speed
- Air, Water & Snow Temperature
- Wind Chill
- Barometric Pressure
Kestrel 2500NV Features
- Red night vision display
- Olive drab housing
- Olive drab protective cover with sure-grip
- Data hold function
- Waterproof and floats
- Innovative design for stability and accuracy in abrupt condition changes
- user-replaceable sapphire jewel impeller
- Quick response, external thermistor
- High precision pressure sensor
- Assembled in the USA
- 5-year warranty
Kestrel 2500NV Includes
- A slip-on protective cover
- Neck lanyard
- CR2032 coin cell battery (Average life 300 hours)
- Kestrel Certificate of Conformity
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